Improvement in casting metals



UNITED TATEs bAfl-*ENT GFFICE.

nzuA nirLEY, on TROY, NEW YORK.

INI PROVEM ENT I N CASTINGl METALS.

Specification forming part of Letters Patent N0. 14, 115,. dated January 15, 1856.

`To aZ whom, it may concern.:

Beit known thatI, EZRA RIPLEY, o fTroy,

in'the'county of`Rensselaer and State of New York, have invented a certain new and useful Improvement in Casting Metals into the Va- 'rious Shapes Required for Use; and I do hereby .declare that the following4 is a full, clear, 'and exact description of the construction and Aoperation of my'improved molds; reference being had-to the annexed drawings, making a part of this specification, in which- Figurel'is a plan view of the .moldwith cap removed; Fig. 2, a sectional elevation of mold and expanding chamber; andFig. Bis adetached view of the ventilated partition. I The same letters refer to like parts in each l of the gures.

lMy invention r elatesi.to so improving the Aart of casting metals by the force of atmospheric pressure that small metallic articles can'be cast with sharp edges, points, or lines at less'costthan heretofore; and it consistsjin providing a' suitable mold and-connecting the interior of an expansive air-tight chamber with? the interior of the mold by an air.'- passage made crevice-like at itsplace of union'with `the inside'ofthe mold, and immersing the open mouth of the mold in uncovered melted metal, and then immediately by one impulse of said exhauster instantly removing the sir from the mold into the expanded air-chamber through said crevice-like ani-passage, -so that the melted metal shall be forced into the smallest recesses of the mold before the metal shall 'cong'eal, whereby the previous practice of closing the mouth of and extracting .the air from the mold before sinking-the mouthof themold into the -iiuid metal, and the subsequent removal of the stopper'fromthe mouthof the mold, with all r-the consequent bad effects and loss of time, are avoided, as, is also'the use of a valve as hitherto employed'to prevent the melted metal from rushing into the exhauster atthei time-.of filling the mold.

The description of my improved arrange# ment for casting vmetals 'is as follows, viz:` A is aboxlmold constructed" of cast-iron, soap-` stone, plaster-of-paris, or any suitable mate` rial. It has an aperture, B, foi the admission -0f iiuid metal. This aperture must 'be sufficiently large to allow the fluid metal to ass vin and lill the mold quickly, C is a ventihted partition formed of a plate or plates of metal or other material, and having vents or air-pasy sages a a formed in them for the purpose of communicating with the expanding air-chamber by means ofthe air-passage and tube F and the. recess-passages b b, formed in the mold A, orby ohamfering or rounding` the edges of the partition.

D is a cap or coverfor the.1nold,made to rit into it, and resting upon the ventilated partition. This cap is provided with an aperture,

E, through which to pour metal intothemold,

if that wayis preferred', and in suchcase the aperture B may be closed; but when the metal H is taken in 4through the aperture B the aper-4 ture E in the cover is closed air-tight with fire-clay or with any suitable substance, or is omitted -in the cover. The joints between the cover and mold are likewise made perfectlyair-tight by luti-ng them vwith fire-clay or otherwise. H is an air-passage connecting with the air-tube'F, attached tothe expanding airchamber G. This chamberisoonstructed with expel the air from the chamber, when the' lowerhalf of the mold is dipped into the molten metal, as represented bythe red lines, and at the same'instant the expanding chamber is left free to operate by means of the spring within it. v'As the chamber expands, the air inthe mold'is expanded vor rareed through.l

the air-vents -into lthe air-chamber, so as to leave littleor no obstruction to the ingress of the iiuid metal into the mold. This'method is'peculiarly adapted to -and is intendedy for the expeditious casting of small articles such 'as are required to be free from blows strair |s, ilaws,7 Snc., and when the edges,

corners, or lines are required to be sharp, even, and clear, suchas paper and letter seals,

tory machinery, and h'all' arti? bility is'requ'red, and also to of articles of hardware, Src., 'mention of exhausters may be used in the expansive chamber th'erefv j .I claim as -n'iy invention,"and desire to se- .'ge that the mold shall be in# d of air by, one vimpulse of said e I do not use -an-v valves in the exhauster.

:eair-passages shouldbe made at the highest portion of the astings formost purposes can )me'reesses of the molds are crevces,' for the air is almost to .or While running' in the d from the mold before the ty, claim exhausting the mold` u melted nieta, nor the use of mol`ds having vents arrangedfor. the escape of confined or compressed air; 'nor do'I claim the substitution of va simple expansive air-chamber for an f airpump in casting metals by atmospheric l pressure.l

cure by Letters Patent- Instantaneously removing the air whjqlf' rdjnapily 'aus the" mold into an air-tighter` pansive chamber through crevice-likev ain, passages arranged for the purpose immedi atel'y after the open mouth of the moldis im-v mersed in the iiuid metal, all'as herein described and 'speeiiiec`l, whereby the :id .vantagresl herein set forth are attained.

VELBA RIPLEY.

Witnesses:

J. J.SAVAGE,` JOHN MORAN. 1 

